05-01.txt

《MATLAB简明教程》俺买的最新版的MATLAB教材

>> str='I have many good friends!'
str =
I have many good friends!
>> whos
  Name          Size                    Bytes  Class
  EXPLODE       1x5                        40  double array
  F1            1x12                       24  char array
  F2            1x12                       24  char array
  X             1x5                        40  double array
  a             1x28                      224  double array
  ans           1x12                       12  logical array
  label         1x5                       330  cell array
  s1            1x10                       20  char array
  s2            1x10                       20  char array
  s3            1x11                       22  char array
  str           1x25                       50  char array
  w             1x19                       38  char array
  x             1x4                        32  double array

Grand total is 173 elements using 876 bytes
>>
%另外，字符串内的单引号是由两个连续的单引号来表示。字符串连接可以直接从数组连接中得到。继续在命令窗口中输入如下语句，并按Enter键确认。
>>u='we must study hard!'
u =
we must study hard!
>> v='and we should never forget our country!'
v =
and we should never forget our country!
>> w=[u,v]
w =
we must study hard!and we should never forget our country!
>>
%如同矩阵，字符串可以有多个行，但每行必须有相同数目的列数。因此，要用空格以使所有行有相同长度，继续在命令窗口中输入如下语句，并按Enter键确认。
>> t=[' xiao ming kao shang le daxue'
      'xiaofang meiyou kaoshangdaxue'] 
t =
 xiao ming kao shang le daxue
xiaofang meiyou kaoshangdaxue
>>              
%如果各列输入的字符串长度不一致时，MATLAB 7将给出错误的提示。继续在命令窗口中输入如下语句，并按Enter键确认。
>> t=[' xiao ming kao shang le daxue'
'xiaofang meiyou kaoshang daxue']
??? Error using ==> vertcat
All rows in the bracketed expression must have the same 
number of columns.
>>




>> t=['China win 32 gold metals in the Olympic Games'
'and Chinese TAibei Team win 2 gold metals    '
'That doesn''t mean any thing                  ']
t =
China win 32 gold metals in the Olympic Games
and Chinese TAibei Team win 2 gold metals    
That doesn't mean any thing    
 >>      

>> t=['China win 32 gold metals in the Olympic Games'
      'and Chinese TAibei Team win 2 gold metals    '
      'That doesn''t mean any thing                 ']
??? Error using ==> vertcat
All rows in the bracketed expression must have the same 
number of columns.